accessory apartment

noun, US

Definition of accessory apartment

: a rental unit that is located on the lot of or within a single-family owner-occupied home In 1991, the town moved away from an almost exclusive reliance on single-family homes and passed a law that began a process of legalizing some of Huntington's thousands of illegal accessory apartments.Newsday, 14 Sept. 2010

Love words?

You must — there are over 200,000 words in our free online dictionary, but you are looking for one that’s only in the Merriam-Webster Unabridged Dictionary.

Start your free trial today and get unlimited access to America's largest dictionary, with:

  • More than 250,000 words that aren't in our free dictionary
  • Expanded definitions, etymologies, and usage notes
  • Advanced search features
  • Ad free!

First Known Use of accessory apartment

1973, in the meaning defined above

Keep scrolling for more

Learn More about accessory apartment

Time Traveler for accessory apartment

Time Traveler

The first known use of accessory apartment was in 1973

See more words from the same year

Statistics for accessory apartment

Cite this Entry

“Accessory apartment.” Dictionary, Merriam-Webster, Accessed 30 Sep. 2020.

Comments on accessory apartment

What made you want to look up accessory apartment? Please tell us where you read or heard it (including the quote, if possible).


Test Your Vocabulary

Challenging Vocabulary Quiz Returns!

  • stylized drawing of woman pole vaulting across gap to get trophy
  • Which is a synonym of fuliginous?
Spell It

Can you spell these 10 commonly misspelled words?

Syn City

Test Your Knowledge - and learn some interesting things along the way.

Love words? Need even more definitions?

Subscribe to America's largest dictionary and get thousands more definitions and advanced search—ad free!